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My secondaries work but stumble when they first open iv tried adjusting spring tension my choke pull off/air door brake is good I can't get them to stop stumbling the tube's are also in place

What power source do you connect it to?

My boss made use some white type primer on extremely rusty columns in a manufacturing building and I'm talking about smacking with a hammer and watching the rust flakes fall - it held up great! I believe it was a Sherwin Williams product, it vastly outperformed in any rusty red primer i ever used

That was a bust. I want 1:18 minutes of my life back!!

Thank you! I couldn't find shit on this carb, I got this one my 75 cadillac 500

Yes i always wondered why the 403 Oldsmobile Small Block got a 800 cfm and the 400 Pontiac got the 750 , but looking it up it was all for emissions , the 403 s massive bore needed quick filling and responded better to a bigger bore carbie . As stated in GM litreture.

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Hey bro how can i contact you

I like your video

You are Wright about the petrol used was good fuel mileage could you please send phone number 😂

Where is your address to book in to get in touch to have the Work done

Here in Australia is very hard to get the details On how to do it Wright and get to Run Wright when they they're going good just like fuel injection

3 things that can ruin your effort rebuilding a quadrajet. Well plugs leaking, secondary air horn out of adjustment, and the sping under the primary needles stretched out by the previous rebuild.

I had a 71 GS buick 455 in the 80s. I was a big quadrajet fan. I didn't know about the bump. I never thought I had the 800cfm models either. Though my secondaries all went to 90°. On the 455, when you floored it, the vacum never went to zero. Which (as I understood it) meant it needed a bugger carb. I didn't want to go to a holley. I liked the sound of the secondaries opening up.

What a nice snap in ratchet

Get back to work mr squidward

Mike wizoski

Paulie were do you out your big macs? Will they fit in the cup holder

Paulie your breaking my heart

Do you carry the merchandise t shirts in size 4xl?

Holden 253or 4,2 litre Blue motor Rochester has. Been nakered by a so called expert

Quack

Pontiacs used the 800s on the 400 in the trans am for starters and im sure they used them in a lot of the big cu inch motors

Pontiacs used the 800s on the 400 in the trans am for starters and im sure they used them in a lot of the big cu inch motors

Thank you. New hobby for me and I am wondering of this Quadrajet is the correct carb for my "77 IH Scout. I am fairly sure it is not the stock carb because 750 seems like alo tof carb for a 345. Would you recommend I follow your videos an drebuild or purchase different carb? It seems alot of Scout guys get the Edlebrock AVS2. Thank you from Colorado.

I've been doing this method for years! It works good. Except I do not use Simple Green. I use Tide laundry detergent and if there is some hard spots I will use Shout on the spots. Works great!

Hell yeah.

Chevy trucks in the 80' had the 800. My 85 c20 is 17080213, i have 6 or 7 of them for spares and parts, same with my 72 c20 chevy 7042208. I have many dealer manuals, tune up books and 1985 gm rochester new product book that lists all the numbers. I have been told, by someone that wrote a book that my gm dealer books are wrong, and that was only made in 78-79. Lol, holy cow. 800 cfm carbs are all over the place on gm trucks still driving around.

Pontiac had 800 on RA4 and SD 455 for sure

Hey Bud thanks for the info I've worked on quadrajets for about 45 years but I really like how you explain it on TH-cam. I had some ask me the other day why his secondarys wasn't opening and I told him it had to be with the choak it has to be all the way open for you secondarys to open. Thanks for your video.

(I have a 7043250 ra 1223) qjet every place I look at all these videos and see they are all 750cfm or 800cfm. But called holley today for a replacement holley double pumper and they said a 600cfm is recommended for my olds 455 engine. Don't want to rob my car of hp if it needs. Let me know your thoughts thanks

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Doing s*** out of order

You f****** all of that up

☹️ Promo*SM

I have a milk crate filled with quadrajet carbs. I also have a milk crate full of holleys.

Great video. I was working on similar/identical carb. 800 cfm from caddie. I have another metering rod next to the pair of primary rods you inserted. What is my extra metering rod for?? How does yours work without it?? Could I remove mine?

On my ‘84 the left and right take turns not rotating.. it’s odd. Idea?

Vavoline VR1 20w50 is also high zinc. It's also high in molybdenum and phosphorus and has a long racing history. Also like Mobil 15W50 which is also high in ZDDP.

,,,,,,,,,,,,,,,,There's a great book out ; by Cliff Ruggles about Q-jets , published 2006.......If you don't have it , you are gonna need it.................................

for offroad race car cv joints, i was told to use the 101 is that what you recommend? and what would you recommend for wheel bearing on same race car? on the rear it uses the thin cone bearings (timken LL225749 & LL420549) thanks in advance

The primary choke pull off has a dual purpose. 1 to open choke after start up so engine doesn’t run too rich while choke is warming up. 2 the pull off has a metered orifice that controls the secondary opening rate. As the top plate secondary air valve opens its uncovers and pulls fuel out of secondary accelerator orifices,(tiny holes just above the air valves) and aides in smooth transition into 4 barrels. The air valve spring controls opening rate. Bogs are caused by these controls not being used or properly adjusted. When everything is properly set transition is smooth and strong. There also is metering rod height (hanger holes). Properly tuned quads shouldn’t bog unless during low RPM, high gear deep throttle jabs. Secondary jets should measure .136 and if they measure .140 or higher they are worn and will run rich and bog. Get a Quadrajet book by Doug Roe and learn how to tune. Most modifications aren’t needed for smooth street driving, just jetting and stock adjustments as outlined in rebuild sheet.

My issue with my 750 is idle, just cant get it down under 1100 rpm... everything moves smoothly, not sure if its my accelerator pump rod, seems like it might be stopping it from moving further down to touch the idle screw

I have a Qjet 750 just like the one you showed. When I increase the throttle gently the engine tries to shut down but if I close the choke plate with my hand the engine stays on. its acceleration. If I accelerate quickly to full throttle it does so but then it tries to shut down, as if it won't suck gasoline.

I really like both the quadrajet and the thermoquad.

Would love to see the entire process

How much was the replacement liftgate in your area? Tia

the air door adjustment is critical, was hoping to see the best way to adjust the air door tension.

Great video. This was exactly what was going on with mine and now I completely understand why. Thanks!

You're the first guy on youtube I've seen that doesn't have the middle weight in there upside down lol